1. Made of lightweight, breathable nylon fabric that is waterproof. Makes you comfortable to wear and pack light for outdoor sports.2. Reflective strips on the bag and straps keep you safe at night to enjoy night running and cycling.3. The water bottle holder unfolds from the zippered pocket for optional use and holds the bottle very securely with an elastic strap.4. Adjustable waist belt pocket, adjustable easily and quickly adjust to the desired length and fit comfortably around the waist5. Headphone output lets you listen to music while cycling, running, jogging and hiking. You can have a more enjoyable and relaxing exercise experience.